A corset is worn to push up the bust and help slim the waist and usually has boning and most often comes with removable garter straps and some times removable shoulder straps. A over bust corset begins just under the arms and extends to just above the hips whereas a under bust corset begins under the bust and extends to just above the hips. Shorter corsets that cover just the waist area are called cinchers. Corsets are often worn out as tops, under another garment to help slim the figure or in private for fun.